Clarks c410 single speed chainclarks range of chains are offered in a wide range of alternative designs and materials precision engineered and available for all systems and in all specifications whether its a single speed coloured chain for a bmx or an 11 speed self lubricating chain we have it covered standard offering exceptional value this range of chains have been developed with reliability and durability in mind features c410 single speed12x 18 bicycle chain compatible with bm